CVE-2026-31405

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When\nhtype equals 255, an out-of-bounds read occurs on the function pointer\ntable, and the OOB value may be called as a function pointer.\n\nAdd a bounds check on htype against the array size before either table\nis accessed. Out-of-range values now cause the SNDU to be discarded."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - Malformed DVB ULE SNDUs can be delivered as received network/transport-stream data to a configured DVB network interface. In the highest reasonable deployment, an attacker controlling or injecting into the DVB/IP broadcast feed can reach the vulnerable parser remotely without local device access.\nAC:L - The attacker only needs to craft a valid ULE SNDU with htype 255 and a correct CRC on the selected PID. There is no race or condition outside attacker control once the victim is receiving the ULE feed.\nPR:N - Creating the DVB network interface is CAP_SYS_ADMIN-gated on the victim, but exploitation occurs through inbound transport-stream data after setup. The sender of the malicious ULE packet needs no privileges on the victim system.\nUI:N - No victim action is required to process the malicious SNDU once the DVB network interface is active and receiving. Packet handling occurs asynchronously in the demux receive callback.\nS:U - The vulnerable code executes in the kernel and impacts the same operating-system security authority. There is no VM, IOMMU, or separate sandbox boundary crossed.\nC:H - The bug performs an out-of-bounds read from a kernel function-pointer table and may invoke the resulting pointer in kernel context. Treating the possible control-flow hijack at the higher severity, successful exploitation can expose kernel memory.\nI:H - The out-of-bounds table value may be called as a function pointer, creating a potential kernel control-flow hijack. Under the higher-severity rule, this is scored as potential kernel code execution and arbitrary modification.\nA:H - An invalid or unintended function-pointer call in kernel context can directly trigger an oops or panic. The malicious packet can be sent repeatedly to sustain denial of service."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/media/dvb-core/dvb_net.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "e51238718217c4abdb3ccc3b0c0cde265c7ec629", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "b2bd2ee73b697c177157bba534e1b1064c2e66a0", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "29ef43ceb121d67b87f4cbb08439e4e9e732eff8", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "1a6da3dbb9985d00743073a1cc1f96e59f5abc30", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "145e50c2c700fa52b840df7bab206043997dd18e", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "8bde543d2a5f935ba2a6a6325a2e02f8a9256fbe", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "f2b65dcb78c8990e4c68a906627433be1fe38a92", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "24d87712727a5017ad142d63940589a36cd25647", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/media/dvb-core/dvb_net.c"], "versions": [{"version": "2.6.12", "status": "affected"}, {"version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.253", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.167", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.130", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.78", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.19", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.9", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.10.253"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.15.203"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.1.167"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.6.130"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.12.78"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.18.19"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.19.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/e51238718217c4abdb3ccc3b0c0cde265c7ec629"}, {"url": "https://git.kernel.org/stable/c/b2bd2ee73b697c177157bba534e1b1064c2e66a0"}, {"url": "https://git.kernel.org/stable/c/29ef43ceb121d67b87f4cbb08439e4e9e732eff8"}, {"url": "https://git.kernel.org/stable/c/1a6da3dbb9985d00743073a1cc1f96e59f5abc30"}, {"url": "https://git.kernel.org/stable/c/145e50c2c700fa52b840df7bab206043997dd18e"}, {"url": "https://git.kernel.org/stable/c/8bde543d2a5f935ba2a6a6325a2e02f8a9256fbe"}, {"url": "https://git.kernel.org/stable/c/f2b65dcb78c8990e4c68a906627433be1fe38a92"}, {"url": "https://git.kernel.org/stable/c/24d87712727a5017ad142d63940589a36cd25647"}], "title": "media: dvb-net: fix OOB access in ULE extension header tables", "x_generator": {"engine": "bippy-1.2.0"}}}}

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When\nhtype equals 255, an out-of-bounds read occurs on the function pointer\ntable, and the OOB value may be called as a function pointer.\n\nAdd a bounds check on htype against the array size before either table\nis accessed. Out-of-range values now cause the SNDU to be discarded."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nmedia: dvb-net: corregir acceso fuera de l\u00edmites en las tablas de cabecera de extensi\u00f3n ULE\n\nLas tablas ule_mandatory_ext_handlers[] y ule_optional_ext_handlers[] en handle_one_ule_extension() est\u00e1n declaradas con 255 elementos (\u00edndices v\u00e1lidos 0-254), pero el \u00edndice htype se deriva de datos controlados por la red como (ule_sndu_type & 0x00FF), dando un rango de 0-255. Cuando htype es igual a 255, ocurre una lectura fuera de l\u00edmites en la tabla de punteros de funci\u00f3n, y el valor fuera de l\u00edmites puede ser llamado como un puntero de funci\u00f3n.\n\nA\u00f1adir una comprobaci\u00f3n de l\u00edmites en htype contra el tama\u00f1o del array antes de que se acceda a cualquiera de las tablas. Los valores fuera de rango ahora hacen que el SNDU sea descartado."}], "id": "CVE-2026-31405", "lastModified": "2026-07-24T22:10:00.140", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-04-06T08:16:38.253", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/145e50c2c700fa52b840df7bab206043997dd18e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1a6da3dbb9985d00743073a1cc1f96e59f5abc30"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/24d87712727a5017ad142d63940589a36cd25647"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/29ef43ceb121d67b87f4cbb08439e4e9e732eff8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8bde543d2a5f935ba2a6a6325a2e02f8a9256fbe"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b2bd2ee73b697c177157bba534e1b1064c2e66a0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e51238718217c4abdb3ccc3b0c0cde265c7ec629"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f2b65dcb78c8990e4c68a906627433be1fe38a92"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: media: dvb-net: fix OOB access in ULE extension header tables", "id": "2455336", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2455336"}, "csaw": false, "cwe": "CWE-1285", "details": ["A flaw was found in the Linux kernel's dvb-net component. A remote attacker could exploit this vulnerability by sending specially crafted network data. This could lead to an out-of-bounds read in the `handle_one_ule_extension()` function, potentially allowing the attacker to execute arbitrary code. The issue arises because an index derived from network-controlled data can exceed the bounds of an internal function pointer table."], "name": "CVE-2026-31405", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-04-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-31405\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31405\nhttps://lore.kernel.org/linux-cve-announce/2026040603-CVE-2026-31405-8cfb@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,29ef43ceb121d67b87f4cbb08439e4e9e732eff8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,1a6da3dbb9985d00743073a1cc1f96e59f5abc30)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,145e50c2c700fa52b840df7bab206043997dd18e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,8bde543d2a5f935ba2a6a6325a2e02f8a9256fbe)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,f2b65dcb78c8990e4c68a906627433be1fe38a92)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,24d87712727a5017ad142d63940589a36cd25647)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.6.12"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.12)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.167,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.130,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.78,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.19,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.9,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0-rc3,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-04-06T20:14:57.250911+00:00", "updated": "2026-05-20T13:30:26.304350+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}